CVE-2024-26130

cryptography es un paquete manipulado para exponer recetas y primitivas criptográficas a los desarrolladores de Python. A partir de la versión 38.0.0 y anteriores a la versión 42.0.4, si se llama a `pkcs12.serialize_key_and_certificates` con un certificado cuya clave pública no coincide con la clave privada proporcionada y un `encryption_algorithm` con `hmac_hash` configurado (a través de `PrivateFormat .PKCS12.encryption_builder().hmac_hash(...)`, entonces se produciría una desreferencia del puntero NULL, bloqueando el proceso de Python. Esto se resolvió en la versión 42.0.4, la primera versión en la que se genera correctamente un `ValueError` .

A flaw was discovered in python-cryptography. A NULL pointer dereference can be triggered when a PKCS#12 key and certificate do not match. Specifically, if the pkcs12.serialize_key_and_certificates function is called with a non-matching certificate and private key and an encryption algorithm with hmac_hash set, the Python process may crash, leading to a denial of service.

Hubert Kario discovered that python-cryptography incorrectly handled errors returned by the OpenSSL API when processing incorrect padding in RSA PKCS#1 v1.5. A remote attacker could possibly use this issue to expose confidential or sensitive information. It was discovered that python-cryptography incorrectly handled memory operations when processing mismatched PKCS#12 keys. A remote attacker could possibly use this issue to cause python-cryptography to crash, leading to a denial of service. This issue only affected Ubuntu 23.10.